Title

Evaporation of different liquids

Problem Scenario

Broad Question

how does heat affect the evaporation rate of different liquids?

Specific Question

Hypothesis

It is hypothesized that water will evaporate the fastest.

Graph of Hypothesis

Variables

Independent Variable:types of liquids

Dependent Variable:time it takes to evaporate

Variables That Need To Be Controlled:amount of liquid, cups, heat source, place where experiment is held

Vocabulary List That Needs Explanation

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General Plan

I am going to run my experiment between the dates of march 4th to march 21st. My independent variable will be my types of liquids and the three different types of liquids will be water, tea, and orange juice. My experiment will be held in my closet upstairs and the temp will be room temp, I will set up three heat lamps and three tables with the heat lamps pointed directly at the liquids and I will mark where the liquid is in every cup every single day until the experiment is over and each cup will be plastic and have 200ML of the liquids. While I mark the liquids everyday I will observe which liquid will evaporate the most. after conducting my first trial I will see if there are any flaws and if there is I intend to fix them and conduct my experiment a 2nd time.

Potential Problems And Solutions

heat lamps
water near heat lamps

Safety Or Environmental Concerns

Experimental Design

(add the correct headings from the experimental design page before beginning)

Resources and Budget Table

Data Table

Time Line

checking setup march 5th
first trial march 6th-march 8th
second trial march 11th- march 13th
first trial data collecting march 9th
second trial data collecting march 14th
analysis data march 15th-march 17th
results and conclusion write up march 25th-31st

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Background Research

Flow rate of air
This is in part related to the concentration points above. If fresh air is moving over the substance all the time, then the concentration of the substance in the air is less likely to go up with time, thus encouraging faster evaporation. This is the result of the boundary layer at the evaporation surface decreasing with flow velocity, decreasing the diffusion distance in the stagnant layer.
Pressure
Evaporation happens faster if there is less exertion on the surface keeping the molecules from launching themselves.
__Surface area__
A substance that has a larger surface area will evaporate faster, as there are more surface molecules that are able to escape.
Temperature of the substance
If the substance is hotter, then its molecules have a higher average kinetic energy, and evaporation will be faster.
Density
The higher the density the slower a liquid evaporates.
In the US, the National Weather Service measures the actual rate of evaporation from a standardized "pan" open water surface outdoors, at various locations nationwide. Others do likewise around the world. The US data is collected and compiled into an annual evaporation map.[2]The measurements range from under 30 to over 120 inches (3,000 mm) per year.

When clothes are hung on a laundry line, even though the ambient temperature is below the boiling point of water, water evaporates. This is accelerated by factors such as low humidity, heat (from the sun), and wind. In a clothes dryer, hot air is blown through the clothes, allowing water to evaporate very rapidly.

References

__http://en.wikipedia.org/wiki/Evaporation__

Detailed Procedure

1.finish getting materials
2.set up area needed for experiment
3.make sure all cups have same amount of liquids
4.set up heat lamps over cups
5.mark where liquid is each day
6.repeat step 5

Diagram

Photo List

https://docs.google.com/a/students.jbartlett.k12.nh.us/document/d/10cm8QvxvQAmiTOmnEi2BVGWxxarDkzyaUfSVA7xeNgs/edit

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Results

All Raw Data

Photos

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Data Analysis

Conclusion

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Discussion

Benefit to Community and/or Science

Abstract